Anfoka, G., M. Abhary, I. Fattash, and M. Nakhla. “Occurrence and Distribution of Citrus Tristeza Virus (CTV) in the Jordan Valley”. Phytopathologia Mediterranea, vol. 44, no. 1, Apr. 2005, pp. 17-23, doi:10.14601/Phytopathol_Mediterr-1779.